Answer:
b. bipolar II disorder
Step-by-step explanation:
Bipolar II disorder -
It is a type of disorder , which consists of cycles of depressive episodes which are followed by hypomanic periods , where the behavior and mood gets to some other level than the normal phase . It might not be some extreme manic period .
People suffering from bipolar II does not necessarily experience true manic episodes.
people have very high energy and mood which can be problematic , this disorder is less severe than bipolar I .
Hence, from the given situation of the question,
Mary is diagnosed with bipolar II disorder .